Surface Modification of RO Desalination Membrane Using ZnO Nanoparticles of Different Morphologies to Mitigate Fouling

Rajakumaran, Revathy; Boddu, Vinisha; Kumar, Manoj; Chetty, Raghuram

doi:10.1007/978-3-030-13068-8_45

Cited by 1 publication

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“…While most research thus far in this arena has focused on metallic Ag NPs and surface attachment [ 7 , 8 , 9 ], several studies have demonstrated successful incorporation of oxide NPs through zwitterion attachment and incorporation into the membrane polymer matrix during membrane formation [ 10 , 11 ]. Nanoparticles (NPs) made from materials including Cu [ 12 ], CuO [ 13 , 14 , 15 ], Ag [ 16 ], Al 2 O 3 [ 17 ], SiO 2 [ 18 ], ZnO [ 19 ], and TiO 2 [ 20 ], have been shown to have antifouling effects against various organic and inorganic foulants and bacteria. Amongst the different NP compositions, metallic NPs suffer from high metal leaching rates because the mechanism of reactivity is through oxidation and dissolution of the metal cation (i.e., Ag 0 NPs release Ag + ) [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Ultrafiltration Membranes Functionalized with Copper Oxide and Zwitterions for Fouling Resistance

et al. 2022

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Polymeric membrane fouling is a long-standing challenge for water filtration. Metal/metal oxide nanoparticle functionalization of the membrane surface can impart anti-fouling properties through the reactivity of the metal species and the generation of radical species. Copper oxide nanoparticles (CuO NPs) are effective at reducing organic fouling when used in conjunction with hydrogen peroxide, but leaching of copper ions from the membrane has been observed, which can hinder the longevity of the CuO NP activity at the membrane surface. Zwitterions can reduce organic fouling and stabilize NP attachment, suggesting a potential opportunity to combine the two functionalizations. Here, we coated polyethersulfone (PES) ultrafiltration membranes with polydopamine (PDA) and attached the zwitterionic compound, thiolated 2-methacryloyloxyethyl phosphorylcholine (MPC-SH), and CuO NPs. Functionalized membranes resulted in a higher flux recovery ratio (0.694) than the unfunctionalized PES control (0.599). Copper retention was high (>96%) for functionalized membranes. The results indicate that CuO NPs and MPC-SH can reduce organic fouling with only limited copper leaching.

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